baber/WOPTO huggingface dataset:
Patent GB-804537-A (GB)
Title: Process for the preparation of unsaturated polyester resin mixtures
IPC: C08G63/54
Filed: 1957-05-01
Abstract: Unsaturated polyester mixtures which can be polymerized in presence of air to give nontacky films suitable for use as lacquers or casting resins are obtained by incorporating a partially epoxidized unsaturated oil into a polyester formed from one or more unsaturated dicarboxylic acids and one or more polyglycols and combining the resulting modified unsaturated polyester with a monomeric polymerizable vinyl compound. Unsaturated polyesters are obtained in known manner by esterification with glycols of a ,b -unsaturated dicarboxylic acids, e.g. fumaric, maleic acids or their anhydrides. Glycols specified are ethylene, diethylene triethylene glycols, 1,2-, 1,3-propane diols and 1,3-, 1,4-butane diols.  Unsaturated oils which may be epoxidized are soya, linseed, hemp seed, castor, perilla and wood oils and synthetic oils, e.g. tall oils, fatty acid esterified with polyhydric alcohols.  The partially epoxidized oil should have an iodine number of 100-150 after epoxidization.  An inhibitor, e.g. hydroquinone, tertiary butyl pyrocatechol may be dissolved in the vinyl compound, e.g. styrene, to prevent premature copolymerization. Organic hydroperoxides or peroxides may be used as catalysts together with accelerators, e.g. cobalt naphthenate or dimethyl aniline. Saturated mono or dicarboxylic acids and monohydric alcohols may be used in addition to the unsaturated acids and glycols.  The epoxidized oil may be added when the unsaturated polyester ingredients have been reacted to the required acid number.  In examples: (1) linseed oil of acid No. 180 is epoxidized by reaction with hydrogen peroxide and formic acid to give a product having an epoxy content of 2.6 per cent.  Maleic anhydride, phthalic anhydride and 1,2-propane diol are melted and heated to 180-250 DEG  C. under carbon dioxide until a product having an acid No. of 120 is obtained and the product is then reacted with the epoxidized linseed oil.  The product is cooled and mixed with styrene and hydroquinone and then with a 10 per cent solution of cobalt naphthenate in styrene.  The mixture shortly before use is mixed with a 40 per cent methyl ethyl ketonehydroperoxide solution or a 50 per cent cyclohexanone-hydroperoxide solution in dimethyl phthalate and sprayed on to a surface.  In examples: (2) p-tert.-butyl benzoic acid, (3) a hydrogenated resin acid, (4) an unsaturated C16-C18 fatty alcohol are used as constituents of the polyester reactants.  In Example (5) the epoxidized oil is obtained from fish oil.
Patent GB-817167-A (GB)
Title: Face masks for airmen
Inventor: LOBELLE MARCEL JULES ODILON
IPC: A62B18/08
Filed: 1951-06-12
Abstract: 817,167. Helmets. M. L. AVIATION CO. Ltd. June 5, 1952 [June 12, 1951], No. 13928/51. Class 63 [Also in Group XX] In an airman's pressurized suit the transparent eye-shield of the head-gear may be automatically moved from an open position to one in front of the eyes where it seals the viewing aperture. As shown, Fig. 2, the eye-shield is held above the eye aperture of the helmet 2 by hook 21, Fig. 3. A decrease in cabin pressure causes expansion of the bellows 30, 31 in the cover 32 on the upper part of the helmet, Fig. 3. The arm 26 is urged downwards against spring 25 and the hook 21 turns anti-clockwise about pivot 22, releasing spring 20 which moves arm 9 downwards and causes the eye-shield to seal the eye aperture and thus maintains the internal suit pressure. In a modification, not shown, the bellows may be situated in the cabin and control the operation of a solenoid actuated release for the arm 9.
Patent GB-767974-A (GB)
Title: Improvements in or relating to looms for weaving
IPC: D03D51/34
Filed: 1954-05-13
Abstract: 767,974. Weft stop-motions for looms. STOBBS, J. V. March 24, 1955 [May 13, 1954], No. 13980/54. Class 142 (2). A bar 7, which stops the loom and which is connected to and reciprocated by a centre weft fork motion 2, is raised to an inoperative position when the loom is stopped so that the loom may be turned over by hand. The bar 7 carries a stud 13 which, on weft failure, is positioned by the weft fork motion to strike the knock-off handle when the slay beats-up. The bar 7 is then raised by the operator so that a bolt 14 in a guide 5 engages a slot 11. The loom can then be turned over, the bar 7 reciprocating on the bolt 14 without the stud 13 striking the knock-off handle. When the weft is replenished and the loom restarted, the weft fork motion gives the bar 7 its normal reciprocation and the bar 7 falls automatically, the slot 11 disengaging from the bolt 14. The guide 5 carries a blade spring 15. The guide 5 and a second guide 4 carry rollers 6 on their securing bolts and each guide has a front compartment carrying the bar 7 and a rear compartment carrying the check strap. The bar 7 is in two parts adjustably secured by bolts 8 engaging a slot 9.
Patent GB-1248300-A (GB)
Title: Thunderstorm warning system
IPC: G06Q50/28
Filed: 1969-03-18
Abstract: 1, 248, 300. Detecting proximity and violence of thunderstorms. NITRONOBELA.B. March 18, 1969 [March 18, 1968], No. 14040/69. Heading G1U. In a system for detecting the proximity and violence of a thunderstorm, an alert warning is provided when the storm is some distance away, and an alarm warning when it is closer. The alert warning is given if the electric field at the detector system rises above a predetermined lower threshold value or if occasional pulses or pulse trains of r. f. radiation in excess of a predetermined energy are received, while the alarm warning is given in any of the circumstances a) the pulse or pulse trains recur within a predetermined time b) the pulse or pulse train occurs simultaneously with a detected pulse of optical radiation exceeding a predetermined threshold or with an electric field exceeding the lower threshold c) the electric field intensity exceeds the higher threshold. An A. C. signal from an electric field detector 7 (see below) in a detector unit 1 is passed via a cable to two threshold discriminators 8, 9 in a logic unit 2. Any signal from the lower threshold discriminator 8 is passed both to an alerting system 3 and to an OR gate 10. Any signal from the high threshold discriminator 9 is passed to an alarm system 4. R. f. radiation from the thunderstorm is detected at 11 and passed to a threshold discriminator 12. Any output from this is passed to an AND gate 13 to which the output from the OR gate 10 is applied and also to a delay circuit 14. The output from this is passed to the alerting circuit 3 and to the other input of the OR gate 10. The delay circuit is such as to provide an extended pulse after a given interval. Thus the AND circuit will pass a signal if an r. f. signal appears when the electric field is above the lower threshold or if two r. f. signals appear within a given time of one another. The output of the AND circuit is applied to the alarm system 4. An optical radiation detector, responding to lightning flashes in excess of a given intensity may be associated with the system. Optical radiation is detected at 17 Fig. 2 (not shown) and the signal applied to the discriminator 19, whose output is applied to AND gate 20. The r. f. pulse is also applied to this gate, whose output is also applied to the alarm system 4. Electric field detector: This consists of a metal plate 26 within a screened box 21 having a cover with apertures 25. A shutter 24 is rotated to open and close the apertures to the electric field in the vicinity by a motor 23 within the box. An A. C. signal is induced on the plate 26 in accordance with the field intensity and transmitted via a feeder 22 to the logic unit. The detector unit and logic unit are independently earthed.
Patent GB-141264-A (GB)
Abstract: 141,264. Marks, E. C. R., (Nicholls Co., W. H.). Dec. 31, 1917. Moulding-machines. -Relates to moulding- machines of the kind described in Specification 133,086, and consists in a plurality of fluid-operated devices carried by the upper pressing member and adapted to support the cope during drawing. Projections 100 on the cope 45 are engaged by pistons 99 working in four cylinders 96, which can be adjusted, to suit the width of the cope, by a right and left handed screw 93. The four cylinders are connected by pipes 102 with a central bore 104 in the screw 63 which is connected to the supply through a pipe 108 and valve 110. In a modification, the pistons are arranged horizontally and are connected to adjustable pins 132, Fig. 8, which engage recesses 135 in the cope.
Patent GB-1059812-A (GB)
Title: Novel processes for the preparation of intermediates useful in the preparation of colchicine compounds, and the intermediates thus prepared
IPC: C07C51/09
Filed: 1964-04-06
Abstract: Compounds of Formula VI are prepared by heating in presence of a sulphonic acid compounds of Formula V; X1, X2 and X3 are alkoxy and R is alkyl.  <FORM:1059812/C2/1> <FORM:1059812/C2/2> The product (VI) may be saponified to the corresponding acid (R = H).  Starting materials (V) are prepared by reacting a 1-(3-bromo- or iodo-propyl)-3,4,5-trialkoxybenzene with an alkyl 3-keto adipate giving the alkyl 8-trialkoxyphenyl-5-carboalkoxy-4-keto octanoate which is treated with acid or alkali and the product (V, R = H) is reacted with a diazoalkane.
Patent GB-1473462-A (GB)
Title: Sand blowing head
IPC: B22C15/24
Filed: 1975-04-07
Abstract: 1473462 Foundry moulding apparatus FOMES SA FOUNDRY & METALLURGICAL SUPPLIES CORP 7 April 1975 [12 April 1974] 14181/75 Heading B3G Apparatus for blowing sand into moulds for producing foundry cores includes an air accumulator 1 with an outlet 5 which, in the sand blowing position, seals against the open upper position, seals against the open upper end of a sand containing tank 9 whereby when a valve 17 is lowered air flows into the tank and sand is blown therefrom into a mould located below the tank. The tank is horizontally movable on bars 32 by a double acting jack 35 between positions below the accumulator and a sand hopper 31. Air is fed to the accumulator via a line 2, and flows into the tank via passages 4 when the valve is lowered by a piston 12 and cylinder 10 supplied by a fluid line 13. The tank has a perforated lining 25 and a flexible annulus 24 attached to the base of the cylinder which deflects air through the upper part of the lining and prevents upward flow of air and sand into the outlet 5. One of the mould parts 37, 38 is moved by a jack 41 to enable the moulding to be removed and received by a conveyer 42. The accumulator is moved vertically by a jack 43 to bring its outlet into sealing engagement with the tank.
Patent GB-797597-A (GB)
Title: Hydraulic control valve
IPC: F15B13/06
Filed: 1955-05-17
Abstract: 797,597. Valves. PROTTER, S. May 15, 1956 [May 17, 1955], No. 14222/55. Class 135. An hydraulic control valve consists of at least two rotatable or, as shown, reciprocable pins which may be coupled together and have holes or grooves so arranged that in one position of the coupled pins at least one duct through the valve body is opened and at least one other duct is closed whereas a movement of the pins to another position blocks the formerly open duct and opens the formerly closed duct, whilst the pins may be uncoupled for independent control of the ducts. As shown, three plungers 6A, 6B, 6C have transverse ports 10 for placing an inlet 1 in communication with respective outlets 5A, 5B, 5C. Each pin is actuated by a bell-crank lever 7A &c. pivoted at 8 and the levers 7A, 7B may be coupled for simultaneous operation by a handle 9 pivoted to the lever 7A.
Patent GB-1242942-A (GB)
Title: Three-dimensional puzzle
Inventor: LOMAS JOSEPH WATSON
IPC: A63F9/12
Filed: 1969-03-18
Abstract: 1,242,942. Jig-saw puzzles. J. W. LOMAS. 13 April, 1970 [18 March, 1969], No. 14245/69. Heading A6H. A jig-saw puzzle comprises a number of irregularly-shaped pieces no one of which is identical with any of the others, which pieces are provided with interlocking channels and projections so that they can be assembled to form a parallelepiped.
Patent GB-874153-A (GB)
Title: Improved model sailing boat
IPC: A63H23/04
Filed: 1959-04-27
Abstract: 874,153. Model sailing boa's. KOHNSTAM, R. Jan. 26, 1960 [April 27, 1959], No. 14283/59. Class 132(3). A model sailing boat is provided with a propeller driven by an auxiliary motor which is automatically brought into operation if the model is becalmed. As shown, a battery driven electric motor 29 has a lever switch 20 pivoted at 21 and spring loaded at 24 to its "on" position. When the sail is blown to one side or the other, a cord 15, secured to the boom 13 and mast 12 and passing through an eye 16 in the switch, pulls the switch to its "off" position. The length of the cord, and thus the amplitude of the boom's swing, is adjustable by means of a device 18. The motor may alternatively be clockwork in which case the lever 20 may be connected to a start-stop mechanism thereof. In a modification, the cord is deflected downwardly from the mast so as to engage a part of a switch prior to continuing via a deck eye to the boom. In another embodiment, the boom has a springy wiping contact which contacts a metal plate in the deck to form a switch.
Patent GB-202420-A (GB)
Title: Method of producing high relief plates or moulds for letter press printing
IPC: B41C3/00
Filed: 1922-05-20
Abstract: 202,420. Scholz, P. J. A., and Woehler, C. W. May 20,1922. Photo-mechanical printing-surfaces. - A relief printing surface is prepared by exposing a gelatincoated and sensitized sheet, preferably of thick paper or other flexible material, through a positive transparency of the drawing &c. to be reproduced, washing away the chromate from the unaffected parts of the gelatine with cold water, rolling up with fatty ink, applying an aqueous preparation which will be absorbed by the un-inked parts of the gelatin, and finally heating. The aqueous preparation is such that, when heated, it will swell and form a hard layer in relief, and may consist of 1 part of gum arabic or colophony with one part of zinc-white, whiting or gypsum mixed with water. In a modification, the design is drawn or printed in a chromate-containing mixture. on the paper or other sheet coated with unsensitized gelatin, the. whole surface being afterwards exposed to light. The sheet is subsequently treated in the manner described above.
Patent GB-826281-A (GB)
Title: Method of making dl-menthol
Inventor: MCLAUGHLIN HENRY ELWOOD
IPC: C07C35/12
Filed: 1957-05-06
Abstract: Racemic menthol is prepared by hydrogenating a mixture of p-menthadienes to p-menthenes, oxidizing the p-menthenes with performic or peracetic acid, steam distilling the oxidation product at a pH of 0.5 to 1.3 to give dl-menthone and reducing this to dl-menthol.  The p-menthadienes may be obtained by isomerizing pinene from a turpentine source in the presence of sulphuric acid.  The product consists mainly of alpha terpinene, gamma terpinene and isoterpinolene and on hydrogenation under pressure in the presence of Raney nickel mainly 3-p-menthene is obtained.  Palladium, copper chromite and supported nickel may also be used as hydrogenation catalysts.  The 3-p-menthene is purified by distillation and then oxidized with performic or peracetic acid.  The per acids may be formed in situ by mixing the p-menthene with formic or acetic acid and slowly adding hydrogen peroxide.  The oxidation products are mainly menthene glycol, the mono- or diformates or acetates of menthene glycol and menthene oxide.  This oxidation mass is steam distilled after the addition of acid, if necessary, to give a pH in the range 0.5-1.3.  On distillation the oxidation products are variously hydrolysed, dehydrated or isomerized to give a crude menthone product, any free acid present is neutralized and any ester present saponified and the product is then distilled to give dl menthone.  In a preferred procedure the oil phase containing the oxidation products is removed from the aqueous acid phase, washed with water and treated with 20% caustic soda to neutralize any acid and saponify any ester present.  The oil is then acidified with a nonvolatile acid such as sulphuric, phosphoric or oxalic acid to a pH of about 0.8 and steam distilled to give a crude menthone. The crude menthone product is fractionated to give a dl fraction which is hydrogenated under pressure in the presence of Raney nickel, palladium or preferably Adkins' barium promoted copper chromite catalyst.  The crude menthol product is fractionated to give the desired dl fraction and unwanted isomers are returned to the menthone hydrogenator for isomerization.  The various steps are shown diagrammatically on a flow sheet.
Patent GB-593109-A (GB)
Title: Improvements in the method of preparation of nitro olefines
Filed: 1945-06-07
Abstract: Nitro-olefines of the formula R2R3C=C(NO2)R1 are prepared by the pyrolysis in the vapour phase of a nitroester of the formula R2R3R4C=CH(NO2)R1, together with the acid HR4.  In the above formul R1, R2 and R3 are hydrogen or alkyl groups and R4 is an inorganic mineral acid radical or an acyloxy group.  The pyrolysis may take place in the presence of a catalyst such as the mineral acid salts of the alkaline earth metals, aluminium phosphate or sulphate, zinc chloride or silica gel.  In the examples, b -nitrobutyl acetate, 2-nitropropyl-1-acetate, 1-nitropropyl-2-acetate, b -nitroethyl acetate, 1-chloro-2-nitroethane and 1-chloro-2-nitropropane are pyrolysed giving the corresponding nitro-olefines and acids.
Patent GB-528776-A (GB)
Title: Improvements in safety locking devices for the covers and lids of machine casings and pans
IPC: F16P3/08
Filed: 1939-05-15
Abstract: 528,776. Machinery guards. BEKEN, H. F., and TROUGHTON, E. R. May 15, 1939, No. 14427. [Class 80 (iv)] Relates to safety locking devices for machines having a tiltable mixing chamber or pan, and more particularly to the provision of locking means for the lids or covers of such chambers and pans which is so interconnected with the driving mechanism, e.g. for the rotating blades, that the machine cannot be started unless the lid is closed and the lid cannot be opened while the machine is working. The chamber or pan 4 is tiltable about trunnions 3 and has a cover or lid 5 hinged at 28. The machine is controlled by a rod 6 actuated by a handle 7 this rod being slidable in a bore in a block 8 across which can slide a shutter 9 with aperture 10. The rod cannot be moved to start the machine if the aperture 10 and bore 8 are not in register. The shutter 9 is connected to a rod 11 guided at 12 and having at its upper end a roller 13 engaging an arcuate groove 14 in an annular plate 15 which has a pair of diametrically opposite lugs 16 slotted to receive rollers 18 mounted on pins projecting from the chamber 4. The line of the lugs 16 is inclined at about 45 degrees to the rod 11. Connected to the plate 15 opposite the roller 13 is a rod 19 which is connected at its upper end to one arm 20 of a bell-crank lever 21, the other arm 23 of which is hooked and adapted to lock the cover 5. The lever 21 is mounted on a rod 24. As shown, the machine is at rest and the locking mechanism is set to release the cover 5. By throwing the lever 21 into this position the plate 15 was forced downwardly along an oblique path and the shutter 9 was. moved to bring the aperture 10 out of register with the bore 8 thus preventing actuation of the starting rod 6. To permit this rod to be actuated and the machine started, the lid must be closed and the lever 21 moved to lock it whereby the plate 15 and rod 11 are drawn upwardly to bring the aperture 10 and bore 8 in register. To ensure that the lever 21 can be thrown over only when the lid is closed, the lid has a plate 27 which, unless the lid is closed, obstructs a pawl 26 on the shaft 24. The machine may be stopped with the pan in any position and the lid opened and closed again, due to the loose roller and annular slot coupling.
Patent GB-1386545-A (GB)
Title: Pneumatic bumper system for vehicles
IPC: B60R19/20
Filed: 1973-03-26
Abstract: 1386545 Vehicle bumpers FIAT SpA and INDUSTRIE PIRELLI SpA 26 March 1973 [22 April 1972] 14477/73 Heading B7J A vehicle bumper comprises a pair of flexible hollow gas-filled tubular horizontal elements 7a, 7b connected by a pipe 8 having a throttle 9, the elements being encased in a cellular polyurethane shell 6a, 5b, 6a and 6b. Similar bumpers may be provided at each end of a vehicle and be connected by a pipe 13 for transfer of gas. In addition pipe 13 may be connected to two containers 14, 15 of the gas through throttles 18, 19. An impact against any element will be absorbed by transfer of gas to the other elements and the containers. In a modification each element may be replaced by a series of chambers interconnected by pipes having throttles. The elements may be made of a rubberized fabric.
Patent GB-383901-A (GB)
Title: A new device for driving the shuttle in looms
IPC: D03D49/24
Filed: 1932-05-23
Abstract: 383,901. Loom picking mechanism. CAMPS, J. P., 80, Colomer Street, Sabadell, Spain. May 23, 1932, No. 14548. [Class 142 (iii).] In order that the upper end of the picking- stick 4 may move horizontally a bracket 13 secured to its lower end is connected by links 9, 15 to a bracket 19 mounted to oscillate with the lay. The stick is operated by a picking- lever 11 adapted to engage a bell-crank lever 10 mounted on the bracket 19 and linked to the bracket 13. The picking-stick is returned by a spring (not shown) coiled about the axis 18 of the bell-crank lever 10.
Patent GB-528874-A (GB)
Title: Improvements relating to radio beacons for guiding craft
IPC: G01S1/02
Filed: 1939-05-16
Abstract: 528,874. Directive wireless systems. STANDARD TELEPHONES & CABLES, Ltd. May 16, 1939, No. 14603. Convention date, May 25, 1938. [Class 40 (v)] A radio beacon pattern comprises mutually non- overlapping beams A, N either side of the course line C, and a third beam K overlapping each of the beams A, N and symmetrical with respect to the line C. The beams are differentiated by applying a continuous modulation to K and the same modulation but complementarily keyed with the Morse letters A, N to the outer beams. This system obviates shift of the apparent course line due to change in the relative strengths of the beams.